About ISO & Japanese JIS B-Series Paper Size Converter
Technical comparison and conversion tool for B-series paper sizes. Analyzes differences between international ISO 216 B sizes (geometric mean of adjacent A-series sheets) and Japanese Industrial Standard (JIS B) sizes widely used in East Asia for manga, books, and government forms.
Key Capabilities & Features
- Complete comparison of B0 through B8 formats
- Side-by-side dimensional table of ISO B vs Japanese JIS B
- Explains geometric mean formula vs JIS 1.5x area ratio
- Commercial application guides (B7 passports, B5 journals, B4 manga manuscripts, B2 theatrical posters)
How to Use ISO & Japanese JIS B-Series Paper Size Converter
Select B-Size Index
Pick a format number (B0, B1, B2, B3, B4, B5, etc.).
Compare Specifications
Review international ISO dimensions alongside Japanese JIS B standards.
Copy Dimensions
Copy millimeter or inch specifications for your prepress template.
Privacy & In-Browser Execution Guarantee
All calculations execute in-browser.
Frequently Asked Questions
Why are Japanese JIS B sizes different from International ISO B sizes?
ISO B sizes are calculated as the geometric mean between adjacent A-series sheets (e.g. B1 is the geometric mean of A1 and A0). Japanese JIS B sizes are rooted in traditional Edo-period Mino paper sizes, officially standardized to have an area 1.5 times that of the corresponding A-series sheet.
What paper size is used for Japanese manga?
Manga publishing houses traditionally use JIS B4 (257 x 364 mm) for author manuscript drafting and JIS B5 (182 x 257 mm) or B6 for bound retail tankobon volumes.